Sarah Palin, the former Alaska governor-turned-media star, apologized “to those who are disappointed” in her decision to not run for president in 2012, in an interview with Fox News’ Greta Van Susteren on Wednesday night.

“I believe I can be an effective voice in some positive change,” Palin said. “You don’t need a title to make a difference in this country: I’m living proof of that.”

Palin said she aims to see that President Barack Obama is not re-elected, and that more conservatives are elected to the House of Representatives. She added she’d give the president a letter grade of an “F” in economic success, and that his only strengths heading into the next campaign are a big bankroll and having “about 90 percent of the media in his back pocket.”

Without Palin in the race, the front-runners for the Republican nomination include former Massachusetts Gov. Mitt Romney, Texas Gov. Rick Perry and businessman Herman Cain.

Of that crop, Palin said “there is no one perfect candidate but … you can’t just lose hope in what a candidate’s ideas reflect or represent.”

Palin said that through the debates and campaign efforts, she’d be able to determine who the best person for the job is. She said her husband Todd had already spoken to a number of current candidates since she quit the race.

“I believe that at this time I can be more effective in a decisive role to help elect other true public servants to office — from the nation’s governors to congressional seats and the presidency,” Palin said. “I will continue driving the discussion for freedom and free markets, including in the race for president where our candidates must embrace immediate action toward energy independence through domestic resource developments of conventional energy sources, along with renewables.”

“We must reduce tax burdens and onerous regulations that kill American industry, and our candidates must always push to minimize government to strengthen and allow the private sector to create jobs.”